In blynk-server in Blynk before 0.39.7, Directory Traversal exists via a ../ in a URI that has /static or /static/js at the beginning, as demonstrated by reading the /etc/passwd file.
CVSS 3.0HIGH 7.5·Network·No auth·No interaction·EPSS 0.02122·Published 2018-09-30·Fixed in 0.39.7CWE-22